I report on a new optical technique that uses the principles of speckle photography and wave-front shearing to obtain the measurement of surface strains. The strain information stored at each point on the object surface is read out on a point-wise basis. The method is developed from a theoretical point of view, and experimental results are presented.
© 1998 Optical Society of America
Original Manuscript: July 17, 1997
Revised Manuscript: October 1, 1997
Published: March 10, 1998
Pramod K. Rastogi, "Speckle shearing photography: a tool for direct measurement of surface strains," Appl. Opt. 37, 1292-1298 (1998)